I just made an account to respond to this, legally any and all content they've made star wars related belongs to Disney. So unless you want Disney lawyers starting to look at you, which if I recall correctly was the reason why IA was shut down in the first place (that being they didn't want to get hit with legal issues)
So while yes its shitty that there has been content stolen, the most they can do is have the mod taken down. Suing will just lead to Disney coming around and fucking the rest of the star wars modding community once they've seen money is being made off it, and as a lead dev for a big MoW star wars mod the last thing I need is having the last 2 years of work be shut down by Disney.
In the end its a shitty situation no matter what, you've already had tens of thousands of people download it so the only thing you can do is try to keep it off steam. But I can guarantee they'll just upload it to their VK page and other people will have it uploaded on MEGA or google docs.